Manufacture of metal forms



w'. SNYDER.

MANUFACTURE 0F METAL FORMS.

APPLICAI'ION FILED SEPT. IZ, |9l6.

'Patented Sept. 14, v1920.

2 SHEETS-SHEET 2.

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WALTER sivYn/ER,

Y MANnrc'rimuoE l Yip plieaumi"flied'swimmer Beit known that WALTER sNYbER,- if county of Philadelphia have invented Philadelphia, in the andV State of Pennsylvania,

certain new and useful Improvements inthe articles,

Forms of the generalcharacter 'above re- Manufacture of Metal Forms, `whereof the following is a specification, reference being had to the accompanyingfdrawings, in which Y the invention 1s represented as embodied in' a'iorm adapted for the drying ojteXtile such aslstockings.

erred to havelong been' known'fjan'dcomprise av hollow metallicenvelop havingapf proximately the configuration ofthe article to 'be dried, and

Supplying Steam to the interiorle mOSt cases, and particularly n that oi'a'forminf tendedior drying a stocking, l thatv the' device should be direction which determines the external contour of the article to be dried.

Heretofore such' forms made or' cast meta'h'usua' ly brass` or aluminum, or of sheet metal Vpieces rivetedy or br'azed together. Castmetal Jforms have, of

necessity, been more thick and bulging than is desirable,' by reason o f-the practicaldifr'- iculty attending they making of such 'casting. Furthermore', under the-pressures to which these formsl are subjected in use, cast metal orms'have shown a' tendency to leak. This is because castings developfairholes Acaused vby gases developed in the casting.

sandl holes on the surface, create channels by escapes, the steam condensingon the outer surface of the form and injuring Vthe article which is being dried. .Sheet metal, by

These, 'together with reason of the rolling Vprocess to which' it has beensubjected, is not subject vto ob this character made jection,`but forms fot of sheet metalhave hitherto been nonmtegral, that is to say,

ing or soldering orbrazing, leaving la joint where leakage is very liable to occur. When. these .forms are subjected their.use, the metal distends and opens the seams of non-integral forms. Y

By my present invention a form, and a method of .manufacturing the same, whereby the disadvantages ofthe thick or' bulging cast provided .with means for it is desirable; relatively very flat', f `or thin, in comparison'with its width vin the have been eitherl Y conditions at the which the pressure the'tlat pieces of sheet metal have been secured together yby rivety t0 ,the relatively. heavy" internal st earn pressure involved in" from the edges of the I have devised.v "be calledr the median pipe ploy inthe'methodo'.manutacture, as well` `Iigure, is aV perspective view showing sembledjpieces o ffwhich'theormis comf-V posed,y hiring the peculiarv lnovel welding instal formsA andthe tendr pressureare entirely avoided, the form itself".

being f relatively veryfatf and yyet integral illustrated the progressive steps which e m` Y operation employed, which enables me tofatf' tain the desired' result. 7 0

FigII, is a side elevation *of onel'of-the metallicplates' which constitute the form, showing also steam'pipe laid in positionl against the yinner surface ofthe' same;

Fig. JIII, is an' edge. view of Vthe "asseml' bled partsv before they areiintegrally'. united along the edges', showing `both side pieces the position oi'certain internalparts;

Fig. IX, is apartialfvertical section of an enlarged scale on thek Aline IX, IX, or' I*`ig. VI II." A V Y. i

FigS`. fX. XI,fare'-det ails .of some of the metallic pieces which I lemploy at thefbase region of the form, and

illustratingV vrespectively 'l the Y commencement 'of I assem- 'estema Side elevation of indicating "by 'dotted lines ofA af portion of the edge, illustratingl the character of the welding operationfwhich 'is peculiar to my method. 1

In carrying outV lmy invention, I' take, in the case of a stocking, two` Hat. platesl of sheet `steel, having the desired contour,ras

indicated by 1, and metal should have substantial thickness, so as to' permit the peculiar welding operation which will be described vlater on. Remote line o ffthe ligure, I

place 'between the plates 1, and 2, a steam 3,Y which 'extends down to nearthe 2, respectively. vThe v v plates, on what may v w to@ 'of the seeking forni and Yis preferabiy provided with lateral outlets 4, and 5,V a

the free discharge of steam. Y rear,.or base end ofthe pipe 3, is provided with a cylindrical couplin details arev shownv in Fig.y

jacent to its inner extremityysoas to insure* l Thethreaded plug 6, whose" said plughav- Ving a threaded axialopening 7, andtwo projectingV lugs 8, -and'9, respectively. The said projecting lugs enterbetween the plates.

1,and 2,'.at theba'se of the cylindrical "plug 12, is arra of the forni` adjacent to the piece 13, of thickness similar to that of the lugs8,and- `distance piece 14, is arrangedbetween the plates'1,and 2,' at the base and outside of the plug, andanother distance piece 15, is arranged between the opposite vsideof the The platesfare base'.

preferably grooved onftheir internal V faces as shown at 30, and 31, toprov1de channels'v for the flow of condensedisteam to the out'- let in the vplug 12. l

Assuming that 'the parts mentioned have beenV assembled substantially as shown in Figs. Il, vand III, the two Vplates 1, and v`2, are then clamped together by any suitable form. A similar need at the. base plug 6, the inter- Y Space between them being filled by a 4distance 'Y An approximately triangular plates 1, and 2, at the.

means, such` as the clamp 17,.and hand vice 18, see Fig. I, which hold theparts in asy sembled position, andthe entire structure is'held rmly in a visej19, so as to be subjected to the welding'trea'tment. `At this stage of theoperationthe plates 1, and 2, and pipe 3, may be considered as having the positions indicatedy in Figs. IV, kand V.

' Thereafter the edges of the platesl are forced together soA as to meet practically in thev same plane, with a view to the subsequent` Vwelding operation, Vas well as Ato the Vdeslr- .projected from the flame the metal blow pipe is manipulated by the operator,

` of thel projected Hame,fas

vanced along .the edge, which results in aV complete merging ofthe vmetal.from Vthe re-V spective edges followed byfits vsinkingdown union relatively slow, sov that* the metal can become substantially melted, and the blast is point relatively close to the metallicedges, so that by the impact of is actually stirred. .The

soA as to give a slight circular movement or, more Correctly speaking, spiral movement the latter is adsomewh'at into the angularvinters'pa'cebe: tween thev proximate faces of theV thus forming a weldl which extends in#l wardly for a substantial distance, and.

avoiding any Aexternal overflow tof vthe meltedmet'al dowii'thesides. V'Hence at the conclusion of the Yoperation aV rounded edge is left without ing lateral boss or.- ridge.I of the flame is carried Ytoward one ofthe edge-.clamping devices as near as is con` sistent with the avoidance of injury there-1"" vto, and thereafter the clamp is released and applied at a pointa short distance `farther onQtoward which Y thel progressively vadvanced until ceeded along the entire contour including the basey andtip.

Care should be taken. tf'o 'preserve the por# tion of the edge, which is for thetime being undergoing the welding operation, in asubstantially horizontal position,` in order to avoid anyv tendency of the metal to run it has proapplication'.V Y l This method Aof weldingl results in` theV of the parts along their edges in'an absolutely integralr condition,1without any opening or joint.

ablev degree offlatness of' the finished form,

along one or both" sides, the metal'being bent convexly about the pipe 3 as' a spacing member' 'and fulcrum so that the general cross section is that indicatedv in Fig. VI. For this purpose ahand vise, such as that indicated at 20, in Figl, may conveniently `be used. The edge .portions ofthe plates together, so as to 1, and 2,V are Vthen welded as indicated at 25,

become integrally united,

and 26, in Fig.v VII, this being accomplishedv in the following manner:

Theplates whose edges are to be united by welding are clamped together in the angular relation indicated in ig. VI, and held ina vise or other suitable. clamping mechanism,vthe edgesormargins of the plates being blast ofr intenselyv hot character and having flush with one another. `A'

suitable projective force, such as that. of ail` Oxy-acetylene blowpipe, is applied progressivelyalong the laterally contacting edges;

in the direction of the arrow shown in Fig.

` XII, the rate of'forwardmovement being section,-f. e., it is thinnest'at the When the Vprocess ris'completed'"the:- finishedy stocking form has the character` i'ndify kcated in Fig. VIII, the dottedline alongthe external contour indicating in a' general jway the vdepth of the fweld, while the other dotted lines indicate the position of the pipe 3, extending along substantially the line of greatest thickness of the form in contact with the plates ati-its opposite' sides and its connected parts.

plates,

.substantially .any jpr'iect.- J `.The.'applica'tion.'

running welding is again f of the ,form f Y10| along the edge, yor awayfronithev point of y' The formas, it Y will be observed, of generally'convex *crossV edges @fid- 'angular crevice between the lap-Welding, butt-welding,

. flush-edge angularrorganized manipulationl of the blast so as' tov lay the merged, or united metal symmetrically along the edge, Without'eXternal overflow and permit it to settle. into 'the adjacent faces of the plates, and thus extend the depth of the integral autogenousY union. To distinguish the operation from the usual types of Welding processes novv practised, i. e., or kspot-Welding, l term my ,method face Welding, Which expression points-out the characteristics of difference.

Having thus described7my invention, vI claim: .y l. The method ofconstructing a drying form which consists in superposing'metal plates having the general contour of the article to be dried,l with an intervening spacing member remote from their edges; bending :the plates about ulcrum so as to bring their edges together;

and integrally uniting said edges to form a Vsigned V4my Vania, thiseleventh day of September, 1916.

said Vmember as n form convex in cross sectionvvhich consists in superposing metal plates y'having the gen- Y eral contour ofthe article to be dried, With an intervening spacing member extending along substantially the line thickness of the bring their' adjacent surfaces. ltogether at their 'corresponding edges; and integrally uniting said edges by Hush-edge angularface Welding to form a relatively flat, hollow, metallic envelop.

InA testimony Yv'vhereoi-II have hereunto name at Philadelphia, ennsyl- WALTER SNYDER.

Witnesses: v JAMES H. BELL7 E. L. FULLERTON.

30 of greatest form; bending said plates Y Vabout said member as ulcrum so as to 

